Armed with a proper SAP value for your BDG will allow you to be sure that all of your saponifiable elements have been turned into soap. Without a proper SAP value your soap can come out caustic hot or become rancid over time. A proper SAP value will also ensure that your soaps are not superfatted with saponifiable elements such as biodiesel. Undersaponified liquid soaps can be cloudy. However, liquid and gel soaps made with a proper SAP value will turn out crystal clear.